Air/fuel ratio sensor

Details Air/fuel ratio sensor Air/fuel ratio sensor

1987-07-01

1988-05-31

Kaplan, G. L.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204425, 338 34, G01N 2712, G01N 2758

Patent

active

047479302

ABSTRACT:
An air-fuel ratio sensor including a box member having a wall made of oxygen ion-conductive electrolyte having a pair of porous electrodes on opposite sides and a diffusion-limiting portion providing communication between the inside and outside of the box member, and an oxygen gas sensing element formed within the box member by injection and firing. The oxygen gas sensing element has a resistance which varies in accordance with the oxygen partial pressure of the atmosphere in which the sensor is immersed.

REFERENCES:
patent: 4578172 (1986-03-01), Yamada et al.
patent: 4594139 (1986-06-01), Asayama et al.

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